This design implements a USB security token powered by an STM32 microcontroller. The device is engineered for compactness and efficient PCB integration while ensuring robust security features. Key elements of the design include: - **Microcontroller Core:** A STM32F103T8U6 serves as the primary processing unit, handling USB communication and security protocols. - **USB Interface:** A USB-A plug provides connectivity to the host. Dedicated net portals ensure proper routing of the VBUS, D+, D–, and ground signals. - **Power Regulation:** A low-dropout regulator supplies a stable 3.3V operating voltage, ensuring low noise and proper current supply to the microcontroller and peripherals. - **Signal Conditioning and EMI Filtering:** An EMI filter is used to maintain signal integrity and reduce interference while preserving the security token’s functionality. - **Synchronous Elements:** A ceramic resonator is incorporated to provide a precise clock source for USB data transfer and microcontroller operations. - **Additional Components:** Surface-mount resistors, capacitors, and LED indicators are deployed to ensure proper conditioning, decoupling, and status feedback. Their compact 0402 packages facilitate a highly integrated design. - **Connectivity and Net Portals:** Custom net portals are used throughout the schematic to streamline connectivity and PCB layout, keeping the design modular and easy to modify. This USB security token is designed with industry-standard components and robust connectivity to ensure secure, reliable operation in portable security applications. #USBToken #STM32 #PCBDesign #SecurityTechnology #PortableSecurity #Microcontrollers #USBInterface #PowerRegulation #EMIProtection #CompactDesign

DIY BMS using ATTINY841-SSU this hardware has a higher balance current, fuse and TVS diode to help with voltage spikes. Most importantly, an external crystal to the micro controller (attiny841) which means the device is more reliable in low voltage situations

ESP32-S3-PLC For Home and Small Industry, include 8 12V SSR to control DC and AC Current, 8 isolated I/O and a ESP32 as a brain with a USB C to upload the code and the connectivity advantages of the ES32 like WIFI and Bluetooth.

The ATtiny45/85 USB Phone Charge Guard regulates charging by monitoring voltage, current, power, and energy, protecting Li-ion batteries.

Energy harvest from Current Transformer and store in a Supercapacitor. Simulation and PCB. See https://www.ti.com/lit/ug/tidud59/tidud59.pdf

Project Overview: This project is an enhanced LED blinking circuit that goes beyond a simple 555 timer-based design. It incorporates additional features such as random blinking patterns, speed control, and a start/stop function. The project utilizes a microcontroller, such as an Arduino or Raspberry Pi, to control the blinking patterns, speed, and start/stop functionality. LED Blinking: The board features a total of 8 LEDs that blink in various random patterns. When the board is powered on, even before user interaction, the LEDs start blinking randomly, creating an eye-catching display. Each LED has its own current-limiting resistor to ensure proper current flow and prevent damage. The microcontroller is programmed to generate random blinking patterns for the LEDs, ensuring that the LEDs do not blink in a predictable or sequential order. This random blinking adds an element of unpredictability and visual interest to the project. Speed Control: The board includes two speed control buttons that allow the user to adjust the blinking speed of the LEDs. Button 1 is designated as the "fast" button, increasing the blinking speed when pressed, while Button 2 is designated as the "slow" button, decreasing the blinking speed when pressed. The speed control provides a range of blinking speeds, from a slow, gradual blink to a rapid, strobe-like effect. The microcontroller monitors the state of the speed control buttons and adjusts the blinking speed accordingly. Start/Stop Functionality: A third button serves as a start/stop control. When pressed, it toggles the blinking of the LEDs on or off. This allows the user to freeze the blinking pattern at any desired moment or resume the blinking when desired. The microcontroller handles the start/stop functionality by turning the LEDs on or off based on the state of the start/stop button. Manual Speed Adjustment: In addition to the speed control buttons, the board includes a potentiometer or variable resistor. This component allows the user to manually adjust the blinking speed of the LEDs by turning the knob or sliding the control. The manual speed adjustment provides more precise and customizable control over the blinking speed compared to the preset speeds of the buttons. The microcontroller reads the analog value from the potentiometer and adjusts the blinking speed accordingly. Power and Connectivity: The board is powered through a USB-C or USB-micro B connector, allowing it to be easily connected to a power source such as a computer or wall adapter. A voltage regulator may be included to ensure a stable and appropriate voltage supply to the components. A power switch is incorporated to conveniently turn the board on or off.

OctoPower is a monitoring hardware, it provides an end-to-end electricity monitoring solution perfect for monitoring home consumption, solar generation or any AC electrical circuit for that matter. Key features : - 8x clip-on CT current sensor - Full Real/Active power measurement & continuous sampling. - Cumulative energy persisted on reboot. - Wifi (with WPS) and Ethernet support - It send all data on mqtt topic - It can be configurable mqtt topics, calibration, enable/disable wifi over a mqtt api - Upgrade firmware over local network

(AL8805W5) The PicoBuck LED Driver is an economical and easy to use driver that will allow you to control and blend three different LEDs on three different channels. By default, each channel is driven at 330mA; that current can be reduced by either presenting an analog voltage or a PWM signal to the board. Version 12 of the board adds a solderable jumper that can be closed to increase the maximum current to 660mA. The new voltage regulator also increased the voltage rating on the various components on the board, allowing it to be used up to the full 36V rating of the AL8805 part.

Relay based on ESP8266 Max current ------- 15A Max Voltage ------- 250V #relay #esp8266 #iot

ESP32-S3-PLC For Home and Small Industry, include 8 12V SSR to control DC and AC Current, 8 isolated I/O and a ESP32 as a brain with a USB C to upload the code and the connectivity advantages of the ES32 like WIFI and Bluetooth.

The Texas Instruments MSP430FR604x and MSP430FR603x family comprises highly integrated ultrasonic sensing and measurement system-on-chips (SoCs) designed specifically for water and heat metering applications. The featured components, including MSP430FR6047, MSP430FR60471, MSP430FR6045, MSP430FR6037, MSP430FR60371, and MSP430FR6035, deliver best-in-class ultrasonic water flow measurement with ultra-low power consumption. These microcontrollers excel with an active mode current consumption of approximately 120 µA/MHz and a standby mode power draw as low as 450 nA with a real-time clock (RTC) enabled. Key functionalities include a high-precision differential time-of-flight (dTOF) accuracy of less than 25 ps, integrated analog front-end, programmable pulse generation (PPG), and an analog comparator. They also interface directly with standard ultrasonic sensors up to 2.5 MHz and feature up to 256KB FRAM, robust RAM options, and integrated LCD drivers for up to 264 segments. The embedded low-energy accelerator (LEA) enhances digital signal processing capabilities, making these components ideal for battery-powered metering solutions. Peripherals include multiple enhanced serial communication interfaces, high-performance ADCs, DMA controllers, and a suite of timers and encryption modules. These features combine to offer a powerful solution for high-accuracy, low-cost, and ultra-low-power metering applications.

DIY BMS using ATTINY841-SSU this hardware has a higher balance current, fuse and TVS diode to help with voltage spikes. Most importantly, an external crystal to the micro controller (attiny841) which means the device is more reliable in low voltage situations

Compact ACS712 current sensor module, capable of measuring up to 20A of AC or DC current. The layout includes a 2-pin connector for the input current, a terminal for the output voltage, and two capacitors for noise reduction. #template #project #sensor #current_sensor #ACS712

Welcome to your new project. Imagine what you can build here.

Welcome to your new project. Imagine what you can build here.

Welcome to your new project. Imagine what you can build here.

Welcome to your new project. Imagine what you can build here.

This project is a H-Bridge Circuit used to control the rotation direction of a DC motor. It uses resistors, diodes, and transistors to alternately forward and reverse the current flow. #HBridge #project #Template #projectTemplate

A compact battery-powered door/window sensor built around the ESP32-C3-MINI-1-N4 module. The design uses a single non-rechargeable AA cell with a TPS613221A 3.3 V boost regulator, reed switch magnetic contact sensing, low-power wake/report/sleep firmware strategy, RGB status LED for setup feedback, BOOT/EN controls, programming header, and input polarity protection. It is intended for smart-home security and automation applications, supporting WiFi or Bluetooth LE hub reporting with emphasis on low idle current, reliable RF burst power delivery, and field-replaceable battery operation. #ESP32-C3 #BLE #WiFi #DoorSensor #WindowSensor #ReedSwitch #LowPower #BatteryPowered #SmartHome #IoT

The AMS1117 series of adjustable and fixed voltage regulators are designed to provide 1A output current and to operate down to 1V input-to-output differential.

The BLM02AX121SN1# is a chip ferrite bead manufactured by Murata, designed to function as a resistor at noise frequencies, thereby minimizing resonance and maintaining signal integrity. This surface-mount device (SMD) features a compact size of 0.4mm x 0.2mm, making it ideal for noise suppression in small electronic equipment, such as PA modules for cellular phones. The component operates effectively across a wide frequency range (30MHz to several hundred MHz) without requiring a ground connection, making it suitable for circuits without stable ground lines. The BLM02AX121SN1# offers a rated current of 250mA at 125°C, a maximum DC resistance of 0.50Ω, and an impedance of 1200Ω at 100MHz with a tolerance of ±25%. It is available in two packaging options: bulk (bag) with a standard packing quantity of 1000 units and 180mm paper tape with 20000 units. The device is compliant with RoHS and REACH standards, ensuring its suitability for consumer and certain medical and industrial applications.

The TP4056 1A Li-ion Lithium Battery Charging Module with Current Protection – Mini USB is a compact device designed to charge individual lithium ion (Li-Ion) cells that lack their own protective circuit, such as 16550s, with a single cell capacity of 3.7V and 1 Ah or higher. This battery charging module employs the TP4056 charger IC and DW01 battery protection IC to provide a charge current of 1A, which will cease upon completion of the charging process. https://robocraze.com/products/tp4056-lithium-battery-charging-board #PCB #TP4056 #battery

A common return path for electric current. Commonly known as ground.

2U 10-inch rackmount 12V distribution power supply for Dell server PSUs, with 12 managed boost-module slots, per-slot current monitoring, temperature logging, MCU supervision, and optional Ethernet metrics.